MDW → LAS Southwest Airlines

Southwest Airlines · Chicago, IL to Las Vegas, NV · 2,333 flights, 2025-07-01 to 2026-06-30 · aggregated across 127 flight numbers

This route runs much more reliably at some times of day than others — 93% on-time departing 3–6am vs. 52% departing 9pm–12am.
On-time arrival
76%
Median delay
-2 min
90th percentile
+44 min
Cancellation rate
1%

How on-time is Southwest Airlines from MDW to LAS?

Across every Southwest Airlines flight number on MDW → LAS (2,333 flights, 2025-07-01 to 2026-06-30), 76% arrived within 15 minutes of schedule. Median arrival delay -2 min; the worst 10% ran +44 min or later. 1% were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

ArrivalFlightsShare
Early / on-time1,75676%
16-30 min2099%
31-60 min1878%
61-120 min1075%
2+ hrs452%

Performance by month

MonthFlightsOn-timeAvg delay
2025-0725270%+16 min
2025-0821584%+5 min
2025-0920884%+0 min
2025-1020984%+1 min
2025-1116877%+4 min
2025-1218569%+11 min
2026-0116084%0 min
2026-0213880%+2 min
2026-0319165%+13 min
2026-0419077%+8 min
2026-0520179%+4 min
2026-0618763%+21 min

Performance by day of week

DayFlightsOn-time
Mon34275%
Tue34078%
Wed33279%
Thu34074%
Fri34175%
Sat25980%
Sun35073%

Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…